Absolute measurement of the photoionization cross section of the excited7 S state of cesium
Physical Review A(1984)
摘要
We report the first measurement of the absolute cross section for photoionization of the $7S$ state of cesium. The measurement employed a new technique in which the density of the excited-state atoms was determined by the amount of fluorescence. The cross section for photoionization by 540-nm light is 1.14(10)\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}19}$ ${\mathrm{cm}}^{2}$. We also propose a second new technique for the absolute measurement of photoionization cross sections which is based on modulated fluorescence.
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关键词
photoionization cross section,excited7sstate,cesium
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